Change travis for working with Fedora 31
Change travis for working with Fedora 31

*OSBS-8649

Deprecated Fedora 29 replaced with CentOS for Bandit
Fedora 31 was added

Signed-off-by: Salatskyi Serhii <3a2b708ccf3db09237dcdc2ae263a91d7c669197@redhat.com>

DBuildService/dockerfile-parse,DBuildService/dockerfile-parse